Parts for your 2015 Subaru Impreza-Centre bearing

2015 Subaru Impreza centre-bearing

Based on technical documentation, the 2015 Subaru Impreza (GP/GJ) with Symmetrical AWD is fitted with a centre-bearing. The Subaru Factory Service Manual for 2012–2016 Impreza (Drive Shaft System > Propeller Shaft) details a two-piece propeller shaft supported mid-vehicle by a centre support bearing and bracket. Subaru’s genuine parts catalogue (Group 18 – Propeller Shaft) likewise lists a centre support bearing integrated with the prop shaft assembly. Many models supply the bearing with the complete prop shaft rather than as a standalone OEM part.

The centre-bearing on a 2015-subaru-impreza plays a quiet but crucial role. Sitting midway along the two-piece propeller shaft, it supports the shaft, keeps driveline angles tidy, and helps control vibration as torque heads to the rear diff. In day-to-day driving that means smoother take-offs, less droning on the motorway, and a happier AWD system when the road gets greasy.

As part of regular servicing, it pays to inspect the rubber isolator around the bearing, the hanger bracket, and the heat shield nearby. Look for torn rubber, cracking, off-centre sag, or any contact marks on the shaft tunnel. Out on the road, tell-tale signs of a tired centre-bearing include a low-frequency drone that rises with speed, a shudder on take-off, or a thump when shifting from reverse to drive. Because tyre and wheel issues can mimic similar vibes, a quick rotation and balance check is a handy first step before diving under the car.

When replacement is on the cards, expect the exhaust heat shields to come off and the prop shaft to be lowered as an assembly. Mark the flanges and yoke phasing before separation so balance is preserved, and refit to the alignment marks. On many 2015 Imprezas, Subaru supplies the centre-bearing with the complete propeller shaft, aftermarket bearings do exist but pressing the old one off and the new one on requires care to avoid bruising the shaft. Always torque fasteners to the Factory Service Manual specs, use new self-locking nuts where specified, and check the rear diff mount and transmission mount whilst you’re there—fresh mounts can knock down residual vibration.

With normal use, centre-bearings often run well past 150,000–200,000 kilometres. Harsh roads, lifted suspension, or fluid contamination can shorten that. A quick look at each major service keeps small issues from becoming a driveline headache.

• Common symptoms: drone at speed, shudder on launch, clunk on direction changes
• Service tips: inspect rubber isolator and bracket, mark phasing, follow FSM torque specs
• Replacement: often supplied as full prop shaft assembly, aftermarket bearing requires pressing and careful reassembly

Popular questions about 2015-subaru-impreza centre-bearing

Does a 2015 Subaru Impreza actually have a centre-bearing?
Yes. The AWD driveline uses a two-piece propeller shaft supported by a centre-bearing and bracket. This is shown in the Subaru Factory Service Manual under Propeller Shaft and in the Subaru parts catalogue for the GP/GJ generation.

What are the signs the centre-bearing is on the way out?
Drivers often notice a low, humming drone that changes with road speed, a shudder on take-off, or a thump when shifting between drive and reverse. Visual checks may reveal a perished rubber isolator or the shaft sitting off-centre in the tunnel.

Can the centre-bearing be replaced by itself?
Subaru commonly supplies the bearing with the complete prop shaft assembly. Some aftermarket bearings are available on their own, but pressing the old unit off and refitting the new one demands care with shaft phasing and balance, and it’s wise to follow FSM procedures and torque values.